Thanks everyone for the comments. Disinfectants are like antibiotics in the sense that one must be aware of what the target organism so that the best disinfectant can be selected. A great resource on disinfectants is available at Iowa State University's Center for Food Security and Public Health and freely available at following link:
The disinfectant review is excellent as well as the tables, especially "The Antimicrobial Spectrum of Disinfectants." If you need to identify which bacteria are gram positive and negative see "Bacteria Group Review Table." For separating enveloped vs. non-enveloped viruses the "Virus Family Table" is a great resource.
Dr. Ramirez, congratulations for this post, I think the good way also that you can increase piglet immunity is first of all taking care of the gestation in the sow, very important, if's the sow eats too much feed in the gestation her wont eat much in lactation, if she has some health problems she wont divide the nutrients in balance by the all piglets, so that as a number 1. as a number 2., piglet deserve a good colostrum management, they are products that has Colostrum extracts that has to be apply after birth because this other and small proteins of the colostrum will may not be available to the all piglets because they reduce their concentration on the colostrum after the first droop of colostrum goat's produced, so it will stimulate the immune system, and also with a good colostrum management giving the Immune globulin from their own mother the and a good amounts the piglet will survive and wont be much scours on the farrowing house.